Regulating surface potential induces dipoles and n-type doping at the perovskite surface. Thus, the solar cells exhibit long device stability due to an increased ion migration barrier. The maximum power point (MPP) measurement shows that the PDA-treated WBG cell can operate for 700 h under 1 sun illumination without loss in PCE.
The surface modifications for light trapping play an important role in thin-film silicon solar cells (TFSSCs). As the flat surface has not had enough to absorb the light from a single pass for an active layer (intrinsic amorphous silicon layer), it needs to be much thicker .
Functional molecules with self-assembled monolayer characteristics were introduced to the surface of the SnO 2 layer using silane derivatives, which tuned the work function of the homojunction depending on the functional groups in the molecules and thereby significantly reduced the built-in electric field.
Chen et al. modulated surface states by surface dipoles to form uniform surface potential distribution, achieving a record open-circuit voltage of 2.19 V. (7) Jiang et al. reduced potential fluctuations on perovskite thin-film surfaces, boosting the efficiency of p-i-n perovskite solar cell devices by over 25%.
Ultraviolet photoelectron spectroscopy reveals that the work function of the PI-treated surface is 4.60 eV, increasing 0.14 eV compared to control film.
The efficiency also improved to 9.63% as the fill factor increased to 70.62%. The surface modifications for light trapping play an important role in thin-film silicon solar cells (TFSSCs).